Apparatus for electrical precipitation of suspended material from gases



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W. A. SQI-JIMHIDT APPARATUS FOR ELECTRICAL PRECIPITATION OF SUSPENDED MATERIAL FROM GASES Original Filed Oct. 25, 1916 Fig.1.

I INVENTOR.

M/aZwZw-fiSMW ATTORNEY Patented 1923- STATES PATENT on-1e;-

"WALTER A. seminar, ornnosfnmuuss, cairroam, As smnon 'ro mrnmmrronan rascrrr'rn'rron column, or Los mourns, camrormm, A coaroanrronor CALIFORNIA.

urm'rus iron Immersion. raucrrr'rarron or susrmmnn MATERIAL mom ensuetontinnntion of application- Icrisl In.

To ell'wlwm it may concern;

. Be it known thatiI, WALTER A. Screw, acitizen of the Uni'ted States, residing-mt Los'Angeles, in thecounty of-Los'An'geles 6 and State of California,v have invented a new and useful Apparatus for Electrical Precipitationof Suspended Material from Gases, of 'whichthe following 1s a specification.

it This invention relates apparatus for The ,accompanying drawings illustrate embodiments of my invention, and, referl ririg thereto:

g. 1' is a horizontal section of an 'ap-' paratus of the tubular electrode type, taken on line 1-1 in Fig. 2.. 7 I Fig. 2 is a verticalsection on line 2-2 W in Fig. 1. v

Fig. 3 is a vertical section on'line-B-B in Fi 1.. r 1 ig. 4 is a vertical section of another form of the invention, showing the ap lication it of the hammer means to treaters 1n which the discharge electrodes are formed as vfine wires. v

Fig. 5 inF1g.4. In Fig; 6 is a horizontal section on line 6 inllrgfi... Fig. 7 is a side elevation of the top-header showninEig.4.

Fig. ,8 is a. vertical section of one of the w hammer devices, the bearing thereforbeing shown in section.

In Figs. 1 to 3, I have shown my invenis avertical section on line 5-5 tion applied in connection with a gas treater comprising a plurality of vertical pipes, the an invention being, however, --applicable-, to electrical precipitators or treaters of any of the well known types.

,insul ianeoamea octets- 2a, ism, ran application flied Eeptcmber 14, me. Burial no. paaast. I

Thesapparatus shown in l to 3 oi tical fines, near their lower on to suitable means for conductin the gases, and at or near their upper ends into a header 6, into which opens aflue for conducting the gas. The invention is applicablein connection with either up draft or down treater flues 1, the drawin struction more particular down vdraft, in which the gas supply flue, which .is in connection with a furnace or other source of gas containing suspended particles. treater flues 1 open at their lower ends into suitable means, not shown, away the treated gases. 1.

These discharge electrodes 9 are shown as mounted on a, lrame, supported on insula- -tors-10in;chamber's or'lns'ulator boxes 11, extending able insu showing a con y designed for v ating means, suc as; discs 12 of ating material, being provided 'where the main-beams .13 of said frame pass through the walls o'fthe header. Said electrodes 9 ma be suspended from cross bars idsupported by the beams 13 and may be rigidly securedto, said cross bars. in case the electrodes 9 are oi such construction as to makecfurther support necessary they may be braced-or spaced at their lower ends by suitable connecting means. The main beams 13 preferably consist of pipes of sutficientdiameter to provide the required orderCto protect the insulating, discs or plates 12 from undue electrical strain by reason of excessive-field intensity where the main heams 23 pass through them, I have found it advantageons, in some cases, to provide rounded conductors 18, formed, for example, as discs havingenlarged rounded rims of larger curvature than the 18 being mounted 'on said beams at each side of each insulating disc 12and spaced slightly therefrom.

Knocking or hammer devices are rovided for the discharge electrodes, sai devices consisting, for example, of beer levers 20, pivotally mounted at 21 on the insulated the drawing comprises a plurality of ver-f tubes or 'ipes 1, connected at or case the flue may be The pipe or for conducting alongside thetop'header 6, suitdid draft through the beams 13, said conductors to im art a vertical blow to said frame and the e ectrodes 9 hung therefrom. These hammer levers may be operated by flexible operating means 22, provided with insulators 23, so as to permit of operation of the hammer means 20 without danger to the person operating the same in case he neglects to cut ofi the current to the apparatus before operating the hammer means for the discharge electrodes.

Suitable means are also rovided for knocking or jarring the co lecting electrodes; for example, hammer levers carried by shafts 26, which are mounted to rock in bearings 27, and are operated by suitable means outside the treater casing, for example, by chains 28 connected to lever mechanism 29 for operating said shafts, said hammer levers 25 being adapted to strike plates 30 rigidly mounted on and between adjacent fiiles 1.

Any suitable means may be provided for maintaining the requisite difl'erence of potential between the electrodes above described. Thus, as shown in Fi 1, the high tension side of a step-up trans ormer 36 may be connected through a rectifier 31 and a switch 32 to wire 33 leading to the high tension frame 13 of the treater. The collecting electrodes 1 of the treater are preferably unded as indicated at 34 and the rectifier a ground connection 35 to complete the circuit. I

In the operation of the treater, the gases to be treated for precipitation of suspended material therefrom, are passed through the fines 1 and are then subjected to electrical action so as to effect electrical precipitation of the suspended material on the electrodes 1 and 9. The material deposited on the collecting electrodes may be removed from time to time, by operation of the hammer or knocking devices 25 by their operating means 28, causing sudden vertical jar on t e electrodes 1, with the result that the deposited material is loosened and falls direct y into suitable receiving means, it bein understood that the electrical current wi in general be cut off from the apparatus by opening switch 32, at such times of cleaning, to enable the collected material to more freel drop from the electrodes. Similarly such material as is deposited on the discharge electrodes 9 may be dislodged by operation of the hammer or knocking or jarring means 20. This feature of my invention, in regard to jarring of the discharge electrodes, is not limited to the specific form of such electrode shown and described, but may be applied in connection with any of the usual forms of discharge electrodes, whenever there is atendency to accumulation of precipitated material thereon.

Figs. 4 to 8 illustrate a modification of the invention in which the collecting electrodes are formed as plates or screens 87,11 from frames or beams 88 in a chamber 8 and the dischar electrodes are-formed as wires suspen ed from bars 41 which extend horizontally between and are fastened to horizontal frame members 42 formed, for example, as pipes, which extend through insulating discs 43, in the walls of chamber 39 and are supported on insulators 44 outside of said chamber. Chamber 89 communicates at its lower end with a chamber or flue 45 for conducting the gas thereto, and at its upper end with a tack or outlet flue 46. Suitable tensioning wei ts 47 and spacing frame 48 may be rovi ed at the lower ends of wires 40. The noch'er means for the discharge electrodes consists of arms 50 extending over the respective horizontal su porting bars 41 and mounted for examp on shafts 51 extending axially within the respective supporting pipes 42 and provided with arms 52 whereby they may be operated by suitable operating means such as a chain 54 provided with an insulator 58. In 0 rating these knocking means the hammer van or arm 50 are lifted by the operating means therefor and then allowed to drop on to the bars 41 so as to jar the discharge electrodes by a vertical blow. The knocking means for the collecting electrodes are here shown as tilting levers 55 weighted at each end and carried by a rocking shaft 66 having an arm 57 whereby it may be operated by suitable means such as c sin or otherwise. The knocker levers 50 extend directly over the respective collecting electrodes so that as said levers are thrown one way or the other by said operating means they will strike the said electrodes and impart a vertical blow thereto.

What I claim is:

1. In an apparatus for electrical precipitation of suspended particles from game, the combination with an insulated support and a vertically extendin discharge electrode mounted on said insu ated support and extending downwardly therefrom, of

means mounted on said insulated support for applying a vertical blow to the upper end of said electrode.

2. In an apparatus for electrical precipitation of suspended Kparticles from a horizontal insulate frame, verticaEy extending discharge electrodes hu from said frame, and hammer means movab y mounted on said insulated frame and adapted to 'ar the discharge electrodes so as to dislodge material deposited thereon, and operating means for said hammer means com rising an insulator for the purpose set fo 3. In an apparatus for electrical precipitation of suspended particles from gases, the combination of insulated sup rting means, discharge electrodes hung therefrom and hammer means mounted on said insulated Ill supporting means for jarring said discharge electrodes to dislodge deposited material therefrom.

4. In an apparatus for electrical precipita- 5 "tion of suspended particles from gases, the

for imparting a vertical blow/to said supporting means adjacent to said discharge to electrodes to dislodge deposited material therefrom.

In testimony whereof I have hereunto suloscribed my name this 1st day of September 1922. ALTER A. SCHDT. 

